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Adjusting the volume on an HP Officejet All-in-OneFollow these steps to adjust the volume of the various fax sounds.Adjust the rings and beep volume1.Press the Setup button P(wrench).2.Press the arrow buttons (Left and right) to select Basic Fax Setup , and then press OK . 3.Press the arrow buttons (Left and right) to select Rings and Beep Volume , and then press OK . 4.Press the arrow buttons (Left and right) to adjust the volume, and then press OK . Adjust the phone line and monitor volume 1.Press the Setup button (wrench).2.Press the arrow buttons (Left and right ) to select Basic Fax Setup , and then press OK . 3.Press the arrow buttons (Left and right ) to select Phone Line, Monitor Volume , and then press OK . 4.Press the arrow buttons (Left and right ) to adjust the volume, and then press OK . Adjust the handset volume When you receive a call, pick up the handset of the product, and then press the arrow buttons (Left and right ) to adjust the handset volume.

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It can be the switch is broken or the ribbon cable may have come lose during shipping, the problem is the way the caseis put together with plastic snap-clips which can easily be broken during diassembly of the case, you may also leave some scratch marks during opening also, the seller may not like that and may not honor any warranty.

on the front of the monitor there are key buttons naming menu, ok button and left & right arrow marks buttons first press menu button then go to brightness then by using arrow keys you can increase & decrease the brightness once you are finished decreasing r increasing press ok button.& there are many other settings you can change like contrast etc....

VOLUMEWhile talking, press the VOLUME buttons (left and rightarrows) to control the volume of the handset's earpiece.There are four volume levels. Press the right arrow (+)button to increase the volume level, and press the leftarrow (-) button to decrease. VOL 1 is the lowest level andVOL 4 is the loudest.

You can download a manual here:
http://www.saitek.com/manuals/eclipse_manual.pdf
For the 1, A, and Down Arrow:
My guess is that these are actually the indicator lights for Num Lock, Caps Lock, and Scroll Lock.
For the four silver round buttons:
The top right corner of your Eclipse keyboard features a set of controls for changing your
computer?s audio volume and the brightness of the Eclipse Keyboard?s backlighting.
To reduce audio volume, press button A until the desired volume level is reached. To increase
volume, press button B. To mute the audio output, press button C and press it again to cancel
mute.
Press button D to control the brightness of the backlighting. Press the button to scroll through lights
off, lights full brightness and lights half brightness.

Pixel Mapping is a feature of the camera to check and adjust the CCD and image processing functions. Press the OK/MENU button and then press the right arrow button to enter the Mode Menu. Press the down arrow button until the SETUP tab is highlighted. Press the right arrow button and then the down arrow button until PIXEL MAPPING is highlighted. Press the right arrow key, which will highlight START. Press the OK/MENU. The back of the camera will display an indicator bar with the word BUSY. Once Pixel Mapping is completed the Mode Menu displays. Press the OK/MENU button to resume normal picture taking. The bright dot should no longer appear in your downloaded images.